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Revenue (Narrative) (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Disaggregation of Revenue [Abstract]
Revenue, Remaining Performance Obligation, Amount	$ 54,000
Revenue, performance obligation, recognition percentage, year two	40.00%
Revenue, performance obligation, recognition percentage, year four	35.00%
Operating Income (Loss)	$ 155	$ 161
Diluted earnings (loss) per share	$ 3.79	$ 3.79
Increase (Decrease) in Net Contract Assets	$ 629
Contract with Customer, Liability, Revenue Recognized	$ 758	$ 552

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The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

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